DEVELOPMENT OF A DETERMINISTIC ETHERNET BUILDING BLOCKS FOR SPACE APPLICATIONS

摘要

The benefits of using commercially basedrnnetworking standards and protocols have beenrnwidely discussed and are expected to includernreduction in overall mission cost, shortenedrnintegration and test (I&T) schedules, increasedrnoperations flexibility, and hardware and softwarernupgradeability/scalability with developmentsrnongoing in the commercial world. The deterministicrnEthernet technology TTEthernet [1] diploid on thernNASA Orion spacecraft has demonstrated the usernof the TTEthernet technology for a safety criticalrnhuman space flight application during thernExploration Flight Test 1 (EFT-1).rnThe TTEthernet technology used within the NASArnOrion program has been matured for the use withinrnthis mission but did not lead to a broader use inrnspace applications or an international spacernstandard. Therefore TTTech has developed a newrnversion which allows to scale the technology forrndifferent applications not only the high endrnmissions allowing to decrease the size of thernbuilding blocks leading to a reduction of sizernweight and power enabling the use in smallerrnapplications.rnTTTech is currently developing a full spacernproducts offering for its TTEthernet technology tornallow the use in different space applications notrnrestricted to launchers and human spaceflight. Arnbroad space market assessment and the current ESArnTRP7594 lead to the development of a space gradernTTEthernet controller ASIC based on the ESArnqualified Atmel AT1C8RHA95 process [2].rnIn this paper we will describe our currentrnTTEthernet controller development towards a spacernqualified network component allowing futurernspacecrafts to operate in significant radiationrnenvironments while using a single onboard networkrnfor reliable commanding and data transfer.